Atomic structure of self-organizing iridium induced nanowires on Ge(001)статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 11 мая 2017 г.
Аннотация:The atomic structure of self-organizing iridium (Ir) induced nanowires on Ge(001) is studied by density
functional theory (DFT) calculations and variable-temperature scanning tunneling microscopy. The Ir
induced nanowires are aligned in a direction perpendicular to the Ge(001) substrate dimer rows, have
a width of two atoms and are completely kink-less. Density functional theory calculations show that
the Ir atoms prefer to dive into the Ge(001) substrate and push up the neighboring Ge substrate atoms.
The nanowires are composed of Ge atoms and not Ir atoms as previously assumed. The regions in the
vicinity of the nanowires are very dynamic, even at temperatures as low as 77K. Time-resolved scanning
tunneling microscopy measurements reveal that this dynamics is caused by buckled Ge substrate dimers
that flip back and forth between their two buckled configurations.